During Sundauy night's closing performance of Glee Live! in Dublin, Heather Morris and Naya Rivera joined Darren Criss and Chris Colfer on-stage during their skit toward the end of the show, and both same-sex couples delighted audiences by KISSING!

Check out a video of the SUPER SWEET MOMENT (above)!

We can't! Our heart just can't take it!

The perfect way to close out such a wonderful tour!

KLAINE and BRITTANA for lyfe!

Ugh! But now we have to wait for season three for more of a Gleek fix!

Well of course they're going to get their gay on. They saw first hand like the rest of us what happens when you don't get your RM gay on when Chord Overstreet was kicked to the curb for the upcoming season. The girls know that they have to follow RM's marching orders on the whole gay agenda thing so as to secure bigger lines on the show instead of the unemployment line. DUH!

In July, father John McCain was diagnosed with stage 4 glioblastoma, an aggressive form of brain cancer, which also claimed Beau's life.

When the 33-year-old began crying, the politician went over and consoled her, adding:

"There is hope... And if anybody can make it, your dad [can]."

Biden is also optimistic about "breakthroughs that are occurring now," regarding potential treatment options and cures.

"There's a lot of things happening. Any of you who have somebody who is diagnosed with gliobastoma, which is about as bad as it gets, there's breakthroughs that are occurring now... And it can happen tomorrow."